Mug or similar article



FIG. 1 is a top perspective view of a mug or similar article showing my new design;

FIG. 2 is a rear elevational view thereof, the front elevational view being a mirror image thereof; the broken lines indicating a handle are shown for illustrative purposes only;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a mug or similar article, as shown and described. 